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ADA4620-1ARZ-R7 bảng dữ liệu(PDF) 37 Page - Analog Devices

tên linh kiện ADA4620-1ARZ-R7
Giải thích chi tiết về linh kiện  36 V, Precision, Low Noise, 16.5 MHz JFET Op Amp with Rail-to-Rail Output
PDF  49 Pages
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nhà sản xuất  AD [Analog Devices]
Trang chủ  http://www.analog.com
Logo AD - Analog Devices

ADA4620-1ARZ-R7 bảng dữ liệu(HTML) 37 Page - Analog Devices

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Data Sheet
ADA4620-1, ADA4620-2
analog.com
Rev. 0
37 of 49
Figure 117. Ideal Gain and Phase Plot of the Transimpedance Amplifier Design with Compensation
The gray trace in Figure 117 shows the ideal noise gain over frequencies for the photodiode preamp. Calculate the
noise bandwidth at the fN frequency by:
������
������ =
������
������������������
(������������ + ������������)/������������
(7)
In reality, noise gain is limited by the gain bandwidth of the op amp, and rolls off with open-loop gain. The gray
trace in Figure 118 shows a more realistic noise gain plot, compared to Figure 117.
Figure 118. Attenuated Noise Gain, with Attenuation Following Open-Loop Gain
OPEN-LOOP GAIN
I-TO-V GAIN
NG = 1
G = 1 + CS/CF
fX
fZ
fN
fGBP
f
f
fP
0°
45°
–45°
90°
–90°
–135°
NG = RFCFs
OPEN-LOOP GAIN
fZ
NG = 1 + CS/CF
NG = RFCFs
NG = 1
log f



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